Phenylacetic acids in reducing pain, fever and inflammation

ABSTRACT

Novel Alpha -mercapto-p-cycloalkylphenylacetic acids and their derivatives have been prepared. Compounds of this invention possess useful anti-inflammatory, analgesic and antipyretic properties.

United States Patent [191 Diamond et al.

PHENYLACETIC ACIDS IN REDUCING PAIN, FEVER AND INFLAMMATION Inventors: Julius Diamond, Lafayette Hill;

Norman Julian Santora, Roslyn,

both of Pa.

Assignee: William H. Roher, Inc., Fort Washington, Pa.

Filed: Feb. 6, 1974 Appl. No.: 440,195

Related US. Application Data Division of Ser, No. 152,451, June ll, [97],

Continuation-impart of Ser. No. 34,870, May 5,

1970, Pat. No. 3,864,384.

US. Cl. 424/317; 424/300; 424/303; 424/3l9; 424/304 Primary Examiner-Stanley J. Friedman Attorney, Agent, or Firm-Liddy, Sullivan, Hart, Daniels & Stemple [57] ABSTRACT Novel a-mercapto-p-cycloalkylphenylacetic acids and their derivatives have been prepared. Compounds of this invention possess useful anti-inflammatory, analgesic and antipyretic properties.

5 Claims, No Drawings PHENYLACETIC ACIDS IN REDUCING PAIN, FEVER AND INFLAMMATION CROSS REFERENCE TO RELATED APPLICATIONS This is a division of application Ser. No. 152,451, filed June 11, 1971.

This is a continuation-in-part application of Ser. No. 34,870 filed May 5, 1970, now US. Pat. No. 3,864,384.

SUMMARY OF THE INVENTION This invention desci ibes certain a-mercapto-pcycloalkylphenylacetic acids and their derivatives and their use in therapeutic compositions. In addition, this invention relates to the preparation of these a-mercapto-p-cycloalkylphenylacetic acids. When the compounds of this invention are administered to mammals, they afford significant treatment of inflammation and associated pain and fever.

They further provide analgesic and antipyretic methods for the relief and treatment of pain and fever associated with inflammation.

BACKGROUND OF THE INVENTION There has been continued efforts in research to develop drugs which would significantly inhibit the development of inflammation and relieve the pain and fever associated with it. Much of these efforts have been carried on in the field of steroids. While many of these compounds have been effective, they have had the drawback of causing many side effects.

We have unexpectedly found that a-mercapto-pcycloalkylphenylacetic acid compounds and their derivatives have valuable pharmacologic properties.

We have found that a-mercapto-p-cycloalkylphenylacetic acid compounds and their derivatives possess useful anti-inflammatory, analgesic and antipyretic properties.

We have also found a series of anti-inflammatory compounds which are non-steroidal.

We have further found that these a-mercapto-pcycloalkylphenylacetic acid compounds and their derivatives are novel.

We have also found that the compounds of this invention are useful in effectively providing a method for the inhibition of inflammation and the treatment of associated pain and fever.

We have still further found an entirely new class of anti-inflammatory, analgesic and antipyretic pharmaceutical compositions containing the a-mercapto-pcycloalkylphenylacetic acids and derivatives of this invention as active ingredient.

We have again found a convenient method for synthesizing these compounds.

DESCRIPTION AND PREFERRED EMBODIMENT This invention comprises a class of novel chemical compounds which contain a cycloalkyl radical which is attached to a substituted phenyl-a-mercaptoacetic acid in the para-position. This invention further comprises derivatives of said acetic acids and the method of preparing the same.

This invention also describes a new method of treating inflammation and associated pain and fever as well as novel therapeutic compositions.

The compounds of this invention can be represented by the generic structure which is described by the general formula I where:

R is halo,

nitro,

amino,

acylamino,

monoand diloweralkylamino,

mercapto,

acylthio,

loweralkylthio,

loweralkylsulfinyl,

loweralkylsulfonyl,

hydroxy,

loweralkoxy,

acyloxy,

haloloweralkyl,

cyano,

acetyl or loweralkyl;

R is hydrogen,

chloro,

bromo,

trifluoromethyl,

cyano,

nitro or loweralkylsulfonyl;

X is mercapto,

acylthio,

carboxyacylthio,

aroylthio,

carboxyaroylthio,

loweralkoxythiocarbonylthio,

loweralkoxycarbonylthio,

arloweralkoxycarbonylthio,

amidinothio,

thiocyanato,

thiosulfo,

thioacylthio,

diloweralkylthiocarbamylthio,

carbamylthio,

loweralkylcarbamylthio,

diloweralkylcarbamylthio,

loweralkylthio,

loweralkylsulfinyl,

loweralkylsulfonyl,

sulfo; and

Z is OH,

loweralkoxy,

arloweralkoxy,

loweralkylamino,

diloweralkylamino,

cycloloweralkylamino, NA (where A is loweralkylidenyl or heteroloweralkylidenyl), NHOH,

NHNH or OM (where M is an alkali, alkaline earth or aluminum metal or an ammonium salt). The compounds of this invention contain an asymmetric carbon atom in the alpha-position of the acetic 4 The most preferred compounds of this invention describe a class of chemical compounds which have particular usefulness as anti-inflammatory, analgesic and antipyretic agents. These compounds are described in acid side chain. As a result, the above compounds of formula ll where:

formula I may be obtained as racemic mixtures of their dextro and levorotatory isomers. It is to be un derstood that said d and l isomers as well as the (11 mixtures thereof are embraced within the scope of this invention.

When B is loweralkyl, two racemic mixtures may exist in the case of 2'- or 3'-loweralkylcyclohexylphenyl-a-mercaptoacetate, 2'- or 3-loweralkylcyclopentylphenyl-a-mercaptoacetate, 2'-or 3' or 4-loweralkylcycloheptylphenyla-mercaptoacetate or their derivatives. It is understood that both racemic mixtures are embraced within the scope of this invention.

The preferred R and R substituents are in the 3 and 5 positions.

The preferred compounds of this embodiment describe the cyclohexyl class of chemical compounds which have particular usefulness as anti-inflammatory, analgesic and antipyretic agents. These compounds are described in formula [I where R, R, X and Z are as described above.

Those compounds whose properties are even more preferred are also described by formula ll where:

R is halo,

nitro,

loweralkylsulfonyl,

haloloweralkyl or cyano;

R is hydrogen,

chloro,

bromo or nitro;

X is mercapto,

acylthio,

aroylthio,

loweralkoxythiocarbonylthio,

loweralkoxycarbonylthio,

amidinothio,

thiocyanato,

thiosulfo,

carbamylthio,

loweralkylcarbamylthio,

diloweralkylcarbamylthio,

loweralkylthio,

loweralkylsulfinyl,

loweralkylsulfonyl,

sulfo; and

Z is OH,

loweralkoxy,

arloweralkoxy,

loweralkylamino or l CH-COZ R is halo,

nitro,

loweralkylsulfonyl,

haloloweralkyl or cyano;

R is hydrogen, chloro,

bromo or nitro;

X is mercapto,

acylthio,

aroylthio,

loweralkoxythiocarbonylthio,

loweralkoxycarbonylthio,

thiosulfo,

carbamylthio,

loweralkylcarbamylthio,

diloweralkylcarbamylthio; and

Z is OH,

loweralkoxy,

arloweralkoxy,

loweralkylamino or A special embodiment of this invention which describes novel compounds that are effective in inhibiting inflammation and the treatment of pain and fever associated with inflammation as well as having analgesic and antipyretic effectiveness for the relief and treatment of pain and fever not symptomatically related to an inflammation indication are described by formula Ill 5x Q iii-coon R III The term loweralkyl refers to a loweralkyl hydrocarbon group containing from 1 to about 6 carbon atoms which may be straight chained or branched.

The acyl radical may be any organic radical derived from an organic acid by the removal of its hydroxyl group such as formyl, acetyl, propionyl, 3-carboxypropionyl. 3-carboxy-2-propenoyl, camphoryl, benzoyl, toluoyl or heteroyl such as pyridinoyl, piperidinoyl, thenoyl, etcv Loweralkoxy signifies an alkoxy group containing from 1 to about 6 carbon atoms which may be straight chained or branched.

The preferred aroyl is benzoyl, loweralkylbenzoyl such as toluoyl or halobenzoyl such as p-chlorobenzoyl, 2-carboxybenzoyl, etc.

The term loweralkylidenyl refers to a loweralkylidenyl hydrocarbon group containing from 2 to about 6 carbon atoms.

Heterloweralkylidenyl refers to a loweralkylidenyl hydrocarbon group containing from about 2 to 5 car bon atoms and having one or more hetero atoms in the chain selected from O, N or S, such as piperidinyl, morpholinyl, etc.

The preferred alkali or alkaline earth" metals are sodium, potassium, calcium and magnesium.

The term ammonium salt" refers to the cation formed when ammonia or an organic amine react with the carboxyl group to form ammonium salts of the structure given in the formula. The ammonium salts are formed with a (l) loweralkylamines such as methylamine, diethylamine, triethylamine; (2) hydroxyloweralkylamines such as B-hydroxyethylamine, (3) heterocyclic amines such as Z-aminopyridine, piperazine, piperidine', (4) aralkylamines such as a-methylbenzylamine, phenethylamine; (5) cycloalkylamines such as cyclohexylamine; (6)alkaloids such as quinine, cinchonidine, cinchonine, ephedrine.

Representative compounds of this invention which are particularly useful are as follows:

a-mercapto-3-chloro-4-cyclohexylphenylacetic acid a-acetylthio-3-chloro-4-cyclohexylphenylacetic acid a-propionylthio-3-chloro-4-cyclohexylphenylacetic acid a-butyrylthio-3-chloro-4-cyclohexylphenylacetic acid a-butenoylthio-3-chloro-4-cyclohexylphenylacetic acid a-benzoylthio-3-chloro-4-cyclohexylphenylacetic acid a-(o-toluoylthio)-3-chloro-4-cyclohexylphenylacetic acid a-( a-carboxybenzoylthio )-3-chloro-4-cyclohexylphenylacetic acid a-methoxythiocarbonylthio-3-chloro-4-cyclohexylphenylacetic acid a-ethoxythiocarbonylthio-3-chloro-4-cyclohexylphenylacetic acid a-mcthoxycarbonylthio-3-chloro-4-cyclohexylphenylacetic acid a-ethoxycarbonylthio-3-chloro-4-cyclohexylphenylacetic acid a-benzyloxycarbonylthio-3-chloro-4-cyclohexylphenylacetic acid a-thioformylthio-3-chloro-4-cyclohexylphenylacetic acid a-amidinothio-3-chloro-4-cyclohexylphenylacetic acid 6 oz-thiocyanato-3-chlor0-4-cyclohexylphenylacetic acid a-thiosulfo-3-chloro-4-cyclohexylphenylacetic acid a-carbamylthio-3-chloro-4-cyclohexylphenylacetic acid a-ethylcarbamylthio-3-chloro-4-cyclohexylphenylacetic acid a-dimethylcarbamylthio-3-chloro-4-cyclohexylphenylacetic acid a-diethylcarbamylthio-3-chl0ro-4-cyclohexylphenylacetic acid a-methylthio-3-chloro-4-cyclohexylphenylacetic acid a-ethylthio-B-chloro-4-cyclohexylphenylacetic acid a-propylthio-3-chloro-4-cyclohexylphenylacetic acid a-i-propylthio-3-chloro-4-cyclohexylphenylacetic acid oz-methylsulfinyl-3-chloro-4-cyclohexylphenylacetic acid a-methylsulfonyl-3-chloro-4-cyclohexylphenylacetic acid a-sulfino-3-chloro-4-cyclohexylphenylacetic acid a-sulfo-3-chloro-4-cyclohexylpheny[acetic acid a-acetylthio-3-fluoro-4-cyclohexylphenylacetic acid oz-acetylthio-3-brom0-4-cyclohexylphenylacetic acid ol-acetylthio-3-iodo-4-cyclohexylphenylacetic acid a-acetylthio-3-nitro-4-cyclohexylphenylacetic acid a-acetylthio-3-trifluoromethyl-4-cyclohexylphenylacetic acid a-acetylthio-3-mercapto-4-cyclohexylphenylacetic acid a-acetylthio-3-acetylthio-4-cyclohexylphenylacetic acid a-acetylthio-3-methylmercapto-4-cyclohexylphenylacetic acid a-acetylthio-3-methylsulfinyl-4-cyclohexylphenylacetic acid a-acetylthio-3-methylsulfonyl-4-cyclohexylphenylacetic acid a-acetylthio-3-cyano-4-cyclohexylphenylacetic acid a-acetylthio-3-carboxy-4-cyclohexylphenylacetic acid oz-acetylthio-3-carbethoxy-4-cyclohexylphenylacetic acid a-acetylthio-3-amino-4-cyclohexylphenylacetic acid a-acetylthio-3-acetylamino-4-cyclohexylphenylacetic acid a-acetylthio-3-methylamino-4-cyclohexylphenylacetic acid a-acetylthio-3-dimethylamino-4-cyclohexylphenylacetic acid a-acetylthio-3-hydroxy-4-cyclohexylphenylacetic acid a-acetylthio-3-acetyloxy-4-cyclohexylphenylacetic acid a-acetylthio-3-methoxy-4-cyclohexylphenylacetic acid a-acetylthio-3-acetoxy-4-cyclohexylphenylacetic acid a-acetylthio-3-methyl-4-cyclohexylphenylacetic acid a-acetylthio-3-chloro-5-fluoro-4-cyclohexylphenylacetic acid a-acctylthio-3,5-dichloro-4-cyclohexylphenylacetic acid a-acctylthio3-chloro-5-bromo-4-cyclohexylphenylacetic acid a-acetylthio-3-chloro-5-nitro-4-cyclohexylphenylacetic acid l3 14 l a-ethoxythiocarbonylthio-3,5-dichloro-4-cyclohep- 3-a]kyl-4-cycloalkylphenylglyoxylic acid. Chlorination tylphenylacetic acid or brominatin may be carried out in the presence of a small amount of iodine dissolved in an inert solvent such as carbon tetrachloride. A solution of chlorine or bonnine is then added while the temperature is held -aceiylthlo-3-chloro-4-Yloheptylphenylacwc near 0C. Nitration is carried out with fuming nitric 80mm acid at about 0C. Alkylation is carried out under Frie- The compounds of this invention may be prepared by del Crafts conditions with an alkyl halide and alumithe following general procedures. Condensation of a num chloride. The following reaction equations illuscycloalkylbenzene with a loweralkyl or aralkyl oxalyl trate these methods.

d a-acetylthio-3-chloro-4-cycloheptylphenylacetic acid, sodium salt 5 l ll (CH Cl-E-COOR" (CH CCOOR" iCl or Br M0 Al k-Cl Al c1 3 i z 0 0 H n n (CH C-COOR (cH C-COOR" N02 Hal 0 n 1 (CH 'C-COOR Al k chloride in the presence of anhydrous aluminum chlowhere R" is loweralkyl or arloweralkyl and Hal is results m a P- ycloalkylphenylglyoxylate. The rechloro or bromo. sultmg loweralkyl or aralkyl esters of the p-cycloalkyl- When a loweralkyl group is desired in the cycloalkyl phenylglyoxyhc acid may then be (a) halogenated; (b) ring, then the condensation will take place with the apnitrated or (c) alkylated to obtain the corresponding 0 propriate loweralkyl benzene cycloalkyl followed by lower alkyl esters of a 3-halo-4-cycloalkylphenylglyoxynitration, chlorination, bromination or alkylation as delic acid, a 3-mtro-4-cycloalkylphenylglyoxylic acid or a sired.

8 3 ll 1 2% O Cl-C-COOR" (CH C-COOR HNO Alk-Cl Cl or Br 3 AlCl 2 2 2 n C'COOR "C-COOR" Ha N02 0 ll E-COOR" Ark Appropriately desired end products having various R and R substituents can be prepared by using suitable reactions in order to convert one group to another.

glyoxylate:

b. reacted with trifluoromethyliodide and copper (CH )n -COOR" (3 [EN c. reacted with cuprous methanesulfinate in quinoline at about 150C to obtain a 3-methylsulfonyl4- cycloalkylphenylglyoxylate:

SO CH A 3-nitro-4-cycloalkylphenylglyoxylate may be selectively hydrogenated to the corresponding amine.

powder at about 150C in dimethylformamide t0 i obtain a 3-trifluoromethyl-4-cycloalkylphenyl- (c glyoxylate: [as described in Tetrahedron Letters: 2

o n (cu c-coow CF 1 Hal (3H 0 C00? be hydrides,

o u (cn 1 c-cooa NHZ R"COCl or mo) 0 m 0 -coow.

NHCOR c-ceoa" 2 i A 3-amino-4-cycloalkylphenylglyoxylate may then a. monoor dialkylated with loweralkyl halides or sulfates or acylated with loweracyl chlorides or an- 17 18 b. diazotized to the diazonium fluoroborate which is may also be alkylated with loweralkyl halides or then thermally decomposed to the 3-fluoro-4- sulfates to the alkoxyl group or acylated with lowcycloalkylphenylglyoxylate, eracyl chlorides or anhydrides to the acyloxy com- O 0 ll l ll ll H (CH *CQOR 2 7)n O C0OR HBF NH N BF 0 ll (CH c-coow' c. diazotized and heated in an aqueous medium to 25 pound in the presence of a tertiary amine such as form the 3-hydroxy-4-cycloalkylphenylglyoxylate pyridine,

ll HNC n C-COOR" 2 QCH l C-CSOR" NH CH R"Cl or R"EOCl pyridine O l! (LH C00 ORII (C(JR") or heated in an alcohol to form the 3-alkoxy-4- d. diazotized followed by a Sandmeyer type reaction cycloalkylphenylglyoxylate. The hydroxyl group to yield the halo group,

O 0 F ll HNO ll CH )n -C-CO0R" (m O c-cooR" Br NH Hmo 2 CuCl CuI O f l 2 n (CH C-CDOR" Cl I e. diazotized and heated with an aqueous solution of cycloalkylphenylglyoxylate to obtain the correspondpotassium iodide to prepare the 3-iodo-4-cycloalking 3,S-disubstituted 4-cycloalkylphenylglyoxylate. ylphenylglyoxylate, This may be carried out at any appropriate stage of the 0 O H l ll zl Q C-COOR T (ow C-COOR f. diazotized followed by reaction with potassium synthesis in order to obtain the desired substituents.

ethylxanthate followed by hydrolysis to obtain 3- Thus, for example, a 3-chloro-4-cycloalkylphenylmercapto-4-cycloalkylphenylglyoxylic acid which 20 glyoxylate may be nitrated as above to obtain a 3- can be esterified to a 3-mercapto-4-cycloalkylchloro-5-nitro-4cycloalkylphenylglyoxylate or chloriphenylglyoxylate. This in turn can be lower alkylnated to obtain a 3,5-dichloro-4-cycloalkylphenylated to the lower alkylthio and oxidized to the glyoxylate. A 3-nitro-4-cycloalkylphenylglyoxylate can loweralkylsulfinyl and loweralkylsulfonyl groups or be nitrated to give a 3,5-dinitro-4-cycIoalkylphenylacylated to the acylthio compounds. 25 glyoxylate. A 3-alkyl (com ound may also be nitrated,

O O H (m v F) ii "00? (CH C-COOR" -t T l) HNG xscsoc H 5H 2) NaOH NaOH 3 N 8 B l O 8 ll (CH -CO0R" 2) COOR H 0 SR" 50R" l l-ln0 O O n I! m 0 c-coon m c-cooa" A second nitration or halogenation with chlorine or chlorinated or brominated to the 3-chloro, 3-bromo or bromine may be carried out on the 3-substituted-4- 3-nitro-5-alkyl compounds.

0 I ll (fiH rl C-COOR CHBr) B N0 (21 or- Br B 0 H n H H110 z n 400R 2) 0 II n H -cooa Hy Mk C1 or ll (CH -CO0R" (CH l As a further example of disubstitution, a 3-chloro-5- nitro-4-cycloalkylphenylglyoxylate can be reacted with cuprous cyanide in quinoline at 150C to obtain a 3- cyano-5-nitro-4-cycloalkylphenylglyoxylate; or with 0 ll [;-CO0R" Cl (Br) 0 H C-COOR" -CO0R" tn'fluoremethyl iodide and copoer powder in quinoline at C to obtain a 3-trifluoromethyl-5-nitro-4- cycloalkylphenylglyoxylate; or with cuprous methanesulfinate in quinoline at 150C to a 3-methylsulfonyLS-nitro-4-cycloalkylphenylglyoxylate. Still another example of various disubstitution would be the selective reduction of a 3,5-dinitro-4-cycloalkylphenylglyoxylate with hydrogen or ammonium sulfide to obtain a 3-nitro-5-amino-4-cycloalkylphenylglyoxylate which in turn can be diazotized to the various derivatives.

Cl (N0 HNO (CH C-COOR" Hm CuBr Cl (N0 HNO or KI where R" is lower alkyl Hm Wis l ocean" 1 )HNO c-coon" 2) NaOH Of course, other reactions may be carried out on the trated, chlorinated or brominated as above and again,

above products by diazotization to obtain the desired in turn, converted to the various desired substituents.

Thus, for example, a 3-fluoro-4-cycloalkylphenylglyoxylate may be nitrated or brominated and the nitro Various mono-substituted products may also be ni and bromo groups converted to various substituents.

substituents as previously described.

.1 l (tHgl C-COR" mo (ca c-cooR Br H2 B B r a B :2 0

:F t CuCN 3 B CN B c The p-Cycloalkylphenylglyoxylate ester is converted phenylglyoxylate or a 3-chloro-5-nitro-4-cycloalkylto the corresponding p-cycloalkylphenylglycolate ester phenylglyoxylate can be reduced under sodium boroby hydrogenation in the presence of platinum oxide. ln hydride conditions as above to the 3-nitro-4-cycloalkylthe special case when R or R are substituents sensitive phenylglycolate or 3-chloro-5-nitro-4-cycloalkylto catalytic hydrogenation, e.g. when R or R is N0 phenylglycolate. This in turn may then be catalytically SH, SR, SOR, etc., a selective reduction of the keto reduced to the 3-amino-4-cycloalkylphenylglycolate or function is effected with sodium borohydride to give 3-chloro-5-amino-4-cycloalkylphenylglycolate. The

the p-cycloalkylphenylglycolate ester. amino group can then be diazotized as above to the de- B I B R R 1 OH H (Pt) l n l 500R m (CH cn-cooa It is often more convenient to convert one substituent sired substituents. This may be carried out on any of to another after the reduction of the glyoxylate to the the nitro compounds as outlined. The diazotized prodglycolate. Thus, for example, a 3-nitro-4-cycloalkylucts may then be hydrolyzed to the glycolic acid.

B R' B R NaBH I zM O -7 (CH [IH-COOR" l H (Pt) 8 RI 0H CH-COOR" NH J diazotization etc.

Reaction of a substituted p-cycloalkylphenylglyco- 6 ralkylamine, diloweralkylamine,

cycloloweralkyla- B F Hwo CH-COOR" NSF! 2 8 on M0 5 H20 KHZ)" CH-COOR" on mm R"0H 5 2% H-COOR a NH2 8 on GR HNO H HCOOR- CH z n 0 CH8, cu c003 l where: I

2 R is m (3H 3 hydrogen, a (CH H-COOR" 4 fluoro, R. 5 chloro,

6 brown, 5 N M nuo I 7 trifluoromthyl 2 ll 8 W O cu 000R CYMIO,

9 nitro or R 10 loweraikyisuifonyi. S"

1 M0 0 xscsoc n /g 2) NaOH 2 n w S mine, a nitrogen containing hetero compound such as piperidine, morpholine, piperazine, hydroxylamine and hydrazine gives the corresponding amide, hydroxamic acid, or hydrazide.

1 (cn Cid-COOK"- B W NH3 (01 m H-coim NH R" 2 (cn CH-CONHR" B O Hm") I m CH-CON(R")2 H" CH I cu i (CHzl CH-CON /2 A B an A A w CH-COU a 0 R 0H 2% M CH-CONHOH B R' on ght CH-CONHNHZ where R" is lower alkyl The glycolate esters may be hydrolyzed to the correp-cycloalkylphenylglycolic acid. Reaction of sponding the glycolate ester or glycolic acid with YCl or acid anhydride YOY in the presence of a tertiary amine such as pyridine, picoline,

chloride, acetic anhydride, propionyl chloride, butyryl chloride, succinic anhydride, maleic anhydride, 65 phthalic anhydride, benzoyl chloride, benzoic anhydride, benzyl chlorocarbonate, ethyl chlorocarbonate, dimethylcarbamyl chloride, dibutylcarbamyl chloride,

' benzenesulfonyl chloride, methanesulfonyl chloride.

an acid chloride or quinoline re- 37 38 The B-cyanoglycolate may also be reacted with two where Z is as described in col. 2. equivalents of methylmagnesium iodide in tetrahydro- The corresponding a-haloacetic acid may be prefuran followed by hydrolysis to obtain the 3-acetylpared by heating the ester with acetic acid containing glycolic acid. 5 the corresponding hydrogen halide.

B B R ilial R lllal HOAc Cla CH-COOR" W m cH- B where R" is lower alkyl.

0H The acid addition salts may then be formed by the action of one equivalent of a suitable base with the substituted a-halo-4-cycloalkylphenylacetic acid. Suitable bases thus include for example the alkali metal alkox- CN ides such as sodium methoxide, etc., and the alkali metal and alkaline earth metal hydroxides, carbonates,

bicarbonates, etc. (such as sodium hydroxide, potasl Me M91 sium hydroxide, calcium hydroxide, potassium carbon- I (01 CH-COOR" 2) H 0 ate, sodium bicarbonate, magnesium bicarbonate, 2 etc.). Also, the aluminum salts of the instant products may be obtained by treating the corresponding sodium 8 salt with an appropriate aluminum complex such as alu- OH minum hydroxy chloride hexahydrate, etc. The ammonium salts may be made by reaction with the correl l H-CUUH sponding amine such as methylamine, diethylamine,

B-hydroxyethylamine, piperazine, piperidine, a-

methylbenzylamine, cyclohexylamine, triethylamine,

C[EH3 phenethylamine, etc.

' B R B Hal l'ial l (CH O CH-[IOOH (CH2) H-COUM When a substituted 4-cycloalkylphenylglycolate is Reaction of a substituted a-halo-p-cycloalkylphenyreacted with a phosphorus trihalide, phosphorus pentahalide, phosphorus oxyhalide, sulfurylhalide, thionyl halide, or sulfur halide, the corresponding substituted loweralkylamine, diloweralkylamine, cycloloweralkylalacetate ester with a nitrogen base such as ammonia,

a-halo-4-cycloalkylphenylacetate is prepared. mine, a nitrogen containing hetero compound such as 8 I B R' H l 'l CH-COOR" (14 -cH-c0oR" where R" is lower alkyl; piperidine, morpholine, piperazine results in the correwhere Hal is chloro, bromo or iodo.

Reaction of an a-sulfonate with a metal halide (preferably an alkali halide) results in the corresponding 11- g'ves the Corresponding hydroxa'mc acid and halO comp n drazine gives the corresponding hydrazide.

spending amide. The acetate ester with hydroxylamine 8 0S0 R(Ar) Hal I MHal (01 CH-LOZ Hz)" CH-COZ 

1. A METHOD OF REDUCING INFLAMMATION, PAIN OR FEVER IN MAMMALS WHICH COMPRISES ADMINISTERING TO A MAMAL A DAILY DOSAGE OF 0.5 TO 100 MG/KG OF BODY WEIGHT A COMPOUND HAVING THE FORMULA
 2. The method of claim 1 where R'' is hydrogen and Z is -OH or -OM.
 3. The method of claim 2 where R is halo, nitro, loweralkylsulfonyl, haloloweralkyl or cyano; R'' is hydrogen, chloro, bromo or nitro; and X is mercapto, acylthio, aroylthio, loweralkoxythiocarbonylthio, loweralkoxycarbonylthio, thiosulfo, carbamylthio, loweralkylcarbamylthio; or diloweralkylcarbamylthio.
 4. The method of claim 3 where the compound administered is selected from the group consisting of Alpha -mercapto-3-chloro-4-cyclohexylphenylacetic acid Alpha -acetylthio-3-chloro-4-cyclohexylphenylacetic acid Alpha -propionylthio-3-chloro-4-cyclohexylphenylacetic acid Alpha -butyrylthio-3-chloro-4-cyclohexylphenylacetic acid Alpha -butenoylthio-3-chloro-4-cyclohexylphenylacetic acid Alpha -benzoylthio-3-chloro-4-cyclohexylphenylacetic acid Alpha -( sigma -toluoylthio)-3-chloro-4-cyclohexylphenylacetic acid Alpha -( sigma -carboxybenzoylthio)-3-chloro-4-cyclohexylphenylacetic acid Alpha -methoxythiocarbonylthio-3-chloro-4-cyclohexylphenylacetic acid Alpha -ethoxythiocarbonylthio-3-chloro-4-cyclohexylphenylacetic acid Alpha -methoxycarbonylthio-3-chloro-4-cyclohexylphenylacetic acid Alpha -ethoxycarbonylthio-3-chloro-4-cyclohexylphenylacetic acid Alpha -benzyloxycarbonylthio-3-chloro-4-cyclohexylphenylacetic acid Alpha -thioformylthio-3-chloro-4-cyclohexylphenylacetic acid Alpha -amidinothio-3-chloro-4-cyclohexylphenylacetic acid Alpha -thiocyanato-3-chloro-4-cyclohexylphenylacetic acid Alpha -thiosulfo-3-chloro-4-cyclohexylphenylacetic acid Alpha -carbamylthio-3-chloro-4-cyclohexylphenylacetic acid Alpha -ethylcarbamylthio-3-chloro-4-cyclohexylphenylacetic acid Alpha -dimethylcarbamylthio-3-chloro-4-cyclohexylphenylacetic acid Alpha -diethylcarbamylthio-3-chloro-4-cyclohexylphenylacetic acid Alpha -methylthio-3-chloro-4-cyclohexylphenylacetic acid Alpha -ethylthio-3-chloro-4-cyclohexylphenylacetic acid Alpha -propylthio-3-chloro-4-cyclohexylphenylacetic acid Alpha -i-propylthio-3-chloro-4-cyclohexylphenylacetic acid Alpha -methylsulfinyl-3-chloro-4-cyclohexylphenylacetic acid Alpha -methylsulfonyl-3-chloro-4-cyclohexylphenylacetic acid Alpha -sulfino-3-chloro-4-cyclohexylphenylacetic acid Alpha -sulfo-3-chloro-4-cyclohexylphenylacetic acid.
 5. The method of claim 4 where the compound administered is Alpha -benzoylthio-3-chloro-4-cyclohexylphenylacetic acid. 